welcome huuuuugh jackman! >> total revenue i believe every year: 400 billion dollars. having low prices drives traffic to our stores, and increases sales >> please welcome john legend! john legend: thank you! which then allows us to lower expenses, and lower prices again please welcome tom cruise! >> around the globe wal-mart is taking the lead in making a difference. >> it's a continuous loop. "the american dream has become a global concept. i think it's our country's best export >> usa! usa! usa! 2012 was a good year for walmart. but it was a bad year for bangladesh. >> it experienced the deadliest factory fire in its history. walmart shorts were among the clothes found in the charred remains. but the company escaped accountability and for many western retailers whose clothes are made in bangladesh, it's business as usual. fault lines travels there to investigate why. >> anybody out there know how many zeros are in half a trillion dollars. take it from a numbers guy, they're a lot. >> the fire at the tazreen fashions factory last november started on the ground floor